Backland Development
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Build a home for family in your garden in Cobham

If you have a long or wide garden in Cobham, there may be room for a home where a parent or grown-up child can live close by with their own front door. That might mean an annexe used with your house, or a home that stands alone with permission and paperwork of its own.

Elmbridge Borough Council decides either way, so the first step is to find out what your plot can realistically carry. Our free plot appraisal covers access, space, privacy and the main planning constraints, and talks through who the home is for, before you spend any money on drawings.

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Single-storey garden home with wide glazed doors and a covered porch at the back of a family garden
Planning authority
Elmbridge Borough Council
Postcodes
KT11
Noon sun, 21 March
About 39°
Shadow from a 5 m eaves line
About 6.2 m
Planning plan
Local Plan
County
Surrey

How it plays out in Cobham

Daylight matters twice over when the new home is for a relative who spends much of the day indoors. At noon on 21 March the sun in Cobham is about 39° above the horizon, so a two-storey eaves line around 5 m high casts a shadow of roughly 6.2 m. A single-storey annexe with eaves at half that height casts one about half as long, which is one reason low buildings often sit more easily in a garden. By late December the midday sun climbs only about 15°, so we test winter light on both homes, and on next-door gardens, before the layout is fixed.

Section showing noon sun and shadows in Cobham: about 39 degrees on 21 March and 15 degrees on 21 December21 m21 Mar, noon: sun 39°, shadow 6.2 m21 Dec, noon: sun 15°, shadow 18.4 mExistingNew home
This section is worked out for the latitude of Cobham: around 39° of sun at midday in late March and about 15° at midwinter. It shows why the gap between your house and a new home behind it is about light as well as privacy. Garden assumed to face north.

How we’d take it forward in Cobham

From first call to keys, a family home in Cobham follows a clear order. Free appraisal and site visit; measured survey and design around the person moving in; a planning application to Elmbridge Borough Council; approval under the Building Regulations and any CIL exemption claimed before work starts; then the build, with you living next door throughout. You receive a written quote after design and survey, and we keep the household updated at each stage.

  1. Free plot appraisal

    We look at your plot, access and the planning picture from the desk, talk through who will live in the new home, and visit if it looks viable. There’s no cost and no obligation.

  2. Annexe or separate home

    We set out both routes for your plot, covering what each means for planning, ownership, council tax, CIL and VAT, so you can decide with your family and advisers before design starts.

  3. Survey and design

    A measured survey, then a design built around the person moving in: step-free routes, a ground-floor bedroom if needed and privacy for both households. You get a written quote after design and survey.

  4. Planning and approvals

    We prepare and submit the planning application and manage it with the council, which makes the decision. Before work starts, approval under the Building Regulations is in place and any CIL exemption has been claimed.

Worth checking early

  • VAT savings available on a separate dwelling often don’t apply to an annexe; take advice from a tax adviser before choosing.
  • Planning is the council’s decision, and an annexe is not a way round the rules that apply to a new house.
  • Family plans change: agree ownership, costs and what happens if circumstances change in writing, with a solicitor.

Cobham: questions to ask

Is CIL payable on a family home in Cobham?

Only if Elmbridge Borough Council has adopted the Community Infrastructure Levy, which its website will confirm, and we check it for you during the appraisal. Where it applies, self-build and residential annexe exemptions exist, but both must be claimed before work starts and can be withdrawn if the home is sold or let within three years of completion.

Can you design a home in Cobham for a relative who uses a wheelchair?

Yes. The design can include a level approach and threshold, turning space in each room, a wet room, wider doors and worktops at a usable height. Where Elmbridge Borough Council requires a particular access standard through planning, the design meets it; otherwise it’s your choice how far to go. Input from your relative’s occupational therapist is well worth having.

Can I reclaim VAT on a family annexe in Cobham?

Often not. HMRC’s guidance gives an annexe that can’t be used or sold separately from the main house as an example of work that can’t be zero-rated, and the DIY housebuilders refund scheme asks the same question. A separate dwelling is usually treated differently. Take advice from a tax adviser before you settle the planning route, because the wording of the permission matters.

Do I need planning permission for a granny annexe in Cobham?

Yes, almost always for a detached annexe with its own kitchen, bathroom and bedroom. Elmbridge Borough Council will treat it as accommodation linked to your home and will usually add a condition so it can’t be let or sold separately. A garden building used only as a home office or gym is a different matter, but sleeping and cooking take it beyond those allowances.

Other options in Cobham

Family home in your garden near Cobham

Find out what your garden could become

Free garden plot appraisal. No cost, no obligation, and a straight answer if it won’t work.

Get my free appraisal 0800 088 6248